<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="vue.js"></script>
    <style>
        /* 隐藏未编译的变量 */

        [v-cloak] {
            display: none;
        }

        * {
            margin: 0;
            padding: 0;
        }

        body {
            font: 15px/1.3 'Open Sans', sans-serif;
            color: #5e5b64;
            text-align: center;
        }

        a, a:visited {
            outline: none;
            color: #389dc1;
        }

        a:hover {
            text-decoration: none;
        }

        section, footer, header, aside, nav {
            display: block;
        }


        /*-------------------------
            搜索输入框
        --------------------------*/

        .bar {
            background-color: #5c9bb7;

            background-image: -webkit-linear-gradient(top, #5c9bb7, #5392ad);
            background-image: -moz-linear-gradient(top, #5c9bb7, #5392ad);
            background-image: linear-gradient(top, #5c9bb7, #5392ad);

            box-shadow: 0 1px 1px #ccc;
            border-radius: 2px;
            width: 400px;
            padding: 14px;
            margin: 45px auto 20px;
            position: relative;
        }

        .bar input {
            background: #fff no-repeat 13px 13px;
            background-image: url();

            border: none;
            width: 100%;
            line-height: 19px;
            padding: 11px 0;

            border-radius: 2px;
            box-shadow: 0 2px 8px #c4c4c4 inset;
            text-align: left;
            font-size: 14px;
            font-family: inherit;
            color: #738289;
            font-weight: bold;
            outline: none;
            text-indent: 40px;
        }

        ul {
            list-style: none;
            width: 428px;
            margin: 0 auto;
            text-align: left;
        }

        ul li {
            border-bottom: 1px solid #ddd;
            padding: 10px;
            overflow: hidden;
        }

        ul li img {
            width: 60px;
            height: 60px;
            float: left;
            border: none;
        }

        ul li p {
            margin-left: 75px;
            font-weight: bold;
            padding-top: 12px;
            color: #6e7a7f;
        }
    </style>

</head>
<body>
<form action="" id="main">
    <div class="bar">
        <input type="text" v-model="searchString" placeholder="输入搜索内容">
    </div>
    <ul>
        <li v-for="article in filteredArticles">
            <a v-bind:href="article.url">
                <img v-bind:src="article.image" alt="">
                <p>{{article.title}}</p>
            </a>
        </li>
    </ul>
</form>
<script>
    let demo = new Vue({
        el: "#main",
        data: {
            searchString: "",
            // 数据模型，实际环境你可以根据 Ajax 来获取
            articles: [
                {
                    "title": "What You Need To Know About CSS Variables",
                    "url": "https://www.runoob.com/css/css-tutorial.html",
                    "image": "https://static.runoob.com/images/icon/css.png"
                },
                {
                    "title": "Freebie: 4 Great Looking Pricing Tables",
                    "url": "https://www.runoob.com/html/html-tutorial.html",
                    "image": "https://static.runoob.com/images/icon/html.png"
                },
                {
                    "title": "20 Interesting JavaScript and CSS Libraries for February 2016",
                    "url": "https://www.runoob.com/css3/css3-tutorial.html",
                    "image": "https://static.runoob.com/images/icon/css3.png"
                },
                {
                    "title": "Quick Tip: The Easiest Way To Make Responsive Headers",
                    "url": "https://www.runoob.com/css3/css3-tutorial.html",
                    "image": "https://static.runoob.com/images/icon/css3.png"
                },
                {
                    "title": "Learn SQL In 20 Minutes",
                    "url": "https://www.runoob.com/sql/sql-tutorial.html",
                    "image": "https://static.runoob.com/images/icon/sql.png"
                },
                {
                    "title": "Creating Your First Desktop App With HTML, JS and Electron",
                    "url": "https://www.runoob.com/js/js-tutorial.html",
                    "image": "https://static.runoob.com/images/icon/html.png"
                }
            ]
        },
        computed: {
            filteredArticles: function () {
                let articles_array = this.articles,
                    searchString = this.searchString;
                if (!searchString) {
                    return articles_array;
                }
                searchString = searchString.trim().toLowerCase();

                articles_array = articles_array.filter(function (item) {
                    if (item.title.toLowerCase().indexOf(searchString) !== -1) {
                        return item;
                    }
                });
                return articles_array
            }
        }
    })
</script>
</body>
</html>